This book was written and released a hundred years ago. It's a compilation of somewhat plausible and ridiculous techniques, all of which are poorly executed. There was a jujutsu craze back then in Great Britain, and anyone professing to teach it received attention, apparently...whether it was warranted or not.
The knife defense techniques shown in this are laughable.
Worth reading for a peek into history...worth buying if it's a collectible. As a manual? Nope!